Rock-carrying steam-shovel dipper.



. E. 1. MOYNIHAN. ROCK CARRYING STEAM SHOVEL DIBFER.

APPLICATION FILED .IUNE 26. 1917- 11mm Puma Apr. 23,1918.

EUGENE J. MOYNIl-IAN, or snn raancrsoo, onn ronlvrn.

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reenter I Specification ofLetters Patent.

Patented Apr. as, rare.

Original application filed April 12, 1 917,1Seria1 No. 161,641. Dividedand this application filed June 26, 1917. Serial No. 176,970. a

To all whom it may concern Be it known that I, EUGENEJ. MOYNI- HAN, acitizen of theUnited States, residing at San Francisco, in the county ofSan Fran cisco and State of California, have. invented new and usefulImprovements in Rock- Carrying Steam-Shovel Dippers, of which thefollowing is a specification.

The presentinvention relates to improvements in the Vdippers of steamshovels, dredge'rs, and the like, the present application being adivision of an application filed by me April 12, 1917, Ser. No. 161,641.The object of the invention is to provide a dipper which can be usedeither as a dipper of ordinary form oras one which, without any material increase in size will unload a rock which is so large that it cannotbe unloaded by the ordinary dipper unless it can be rolled. V

In the accompanying drawing, Figure 1 is a side view of my improveddipper; Fig. 2 is a plan view thereof; Fig. 3 is a detail perspectiveview of a part thereof, removed from the dipper; F .ig. 4 is a side viewof the.

dipper converted into a dipper of form suitable for handling largerocks.

Referring to the drawing, 1 indicates a dipper having a front portion 2of the usual form, its upper part having the usual cutting teeth 3,whiclnhowever, form no part of the present'invention. The front portion2 is formed integral with side pieces 4, which are secured on the outersides of a yokeshaped piece 6, from which extend rearwardly eyes 7,through which extends a pintle 8, said pintle also extending througheyes 9, formed on a plate 10, secured to the un- V der side of a dipperhandle 11 at its outer end.

From the central portion of the piece 6 extends upwardly a casting 12having an eye or hearing for a pivot pin 13 by which is pivoted theusual bail 14.

To the outer sides of said side pieces 4 are 7 secured, by rivets 16,cheek plates 17, the

rear portions 18, of which extend inwardly behind the back or centralportion of the yoke-shaped piece 6, as far as the eyes 7 and thenrearwardly and upwardly in parallel planes, their upper ends beingconnected with the upper ends of back braces 19, the lower ends of whichare connected to a bolt 21 extending transversely through the usualcasting 22 secured on the top of the dipper handle 11.

The front 2 of the dipper is extended downward to about the same depth.as the front of the ordinary dipper, but the dipper handle is connectedmuch nearer to the top than in the old construction, since it ispivotally secured to the lower portion of the back of the dipper, whichis much shorter than that of the ordinary dipper.

There is attached to the sides and back of the dipper, which form theupper section of the dipper, a lower section 23 comprising a frontyoke-shaped piece 24 and a rearyokeshaped piece 26, riveted as shown at21, together and to sides 28, the piece 26 having formed thereon lugs 29for use with a door 30, and having secured thereto a back piece 31. Saidpieces 28, extend upwardly above said pieces 24, and are secured bybolts 32 to the lower portions of the cheek plates 17, and the upper endof the back piece 31 is likewise screwed to the back of the uppersection. To the lugs 29 are hinged arms 33, carrying the door 30, whichis also secured by a latch to the front of the dipper.

If the lower section 23 be removed, there can be substituted therefor asupport 34, attached to front ends of arms 36, which extend in largecurves and are pivoted, as shown at 37, at their rear ends to the upwardextensions 18 of the cheek plates 17, in the same manner as the arms ofthe door of the dipper of the usual form, but it is not now a door inthe proper sense of the word, since it does not close the opening in thebottom of the dipper, but serves to support a large rock between itselfand the dipper proper. A narrow strip 38 is removably attached to thearms 36 at the rear of the support 34 and forms a support section whichis removed when it is desired to enlarge the opening between the dipperbody and the arms 36.

The arms 33 and 36 are provided with racks 39, which are engaged bypawls 41 on a shaft 42 extending in bearings atthe under side of thedipper handle. To the bot-' the support 34, but reduces the wear on thefront of the dipper, being changed as often as necessary. Tothe rear endof the latch is connected One end of a chain 48 the other end of whichis connectedwith a lever 49 pivoted on the under side of the dipperhandle and the outer end of which is connected to a chain 51 leading toa point suitable for operation for withdrawing said latch fromengagement with the front of the dipper. To said lever is attached oneend of a chain 52, the other end of which is attached to one of saidpawls ll. a

The support 34: is withdrawn by the cable 53, the use of which is moreparticularly described in United States Letters Patent No. 1,210,194,Dec. 26, 1916.

Copiet of this patent may be obtained to:

ing the connection of the dipper with the dipper handle.

2. A dipper having a back and sides each in upper and lower sections,each lower section being removable from the dipper Without removing anypart of the front of the dipper or changing the connection of the dipperwith the dipper handle.

3. A dipper having a back in upper and lower sections and a front in asingle piece, the lower section being removable from the dipper withoutremoving any part of the front of the dipper or changing the connectionof the dipper with the dipper handle.

4. A dipper having a back and sides each in upper and lower sections anda front in a single piece, each lower section being removable from thedipper without removing any part of the front of the dipper or changingthe connection of the dipper with the dipper handle.

E. J. MOYNIHAN.

five cents each, by addressing the Commissioner of Patents, Washington,D. 0.

